Yeah medicine and technology has increased unbelievably in 20 years, as you'd expect. Imagine another 20 years from now.
Some people think the type of grass, traction on the boots, the softer footballs that get away easier and other things are a factor. They probably are but most ACL are from twists and turns. Players twist and turn more now, whether from the speed of the game or because of the combination of players being a higher technical level playing at speed.